IPA: /ˌpɒliˈæmərist/
KK: /pɑˈliːəˌmɔrɪst/
A person who believes in or practices having romantic relationships with more than one partner at the same time, with the consent of everyone involved.
As a polyamorist, she values open communication and honesty in her relationships.
Polyamorist → It is formed from "poly-" (from Greek "polus", meaning many) and "amor" (from Latin "amor", meaning love) and the suffix "-ist" (meaning one who practices or is concerned with). The word describes a person who practices or believes in having multiple loving relationships simultaneously.
Think of 'many' ('poly-') loves ('amor') to remember that a polyamorist is someone who engages in multiple loving relationships.